Google · Android · CVE-2016-3898
**Name of the Vulnerable Software and Affected Versions**
Android versions 5.0.x through 5.0.1
Android versions 5.1.x through 5.1.0
Android versions 6.x before 2016-09-01
Android versions 7.0 before 2016-09-01
**Description**
The issue allows attackers to cause a denial of service, specifically the loss of locked-screen 911 TTY functionality, via a crafted application. This application can modify the TTY mode by broadcasting an intent.
**Recommendations**
For Android versions 5.0.x through 5.0.1, update to version 5.0.2 or later.
For Android versions 5.1.x through 5.1.0, update to version 5.1.1 or later.
For Android versions 6.x before 2016-09-01, apply the September 2016 security patch or later.
For Android versions 7.0 before 2016-09-01, apply the September 2016 security patch or later.